WEBVTT 00:00.600 --> 00:09.830 This lecture I want to go over making a little library to kind of encapsulate curses. 00:10.150 --> 00:20.520 So in here I'm going to make a new header file in what I call it. 00:20.950 --> 00:24.500 Curses utilities dot h 00:26.890 --> 00:37.210 in that must have going to make a new source file in and call it curses. 00:37.360 --> 00:38.960 It's C.P 00:42.210 --> 00:51.430 in in the H mode to define some functions so first function is going to define it just to initialize 00:51.460 --> 00:52.330 cursors 00:55.420 --> 00:57.850 and going to say 01:00.520 --> 01:11.420 whether or not in this the parameters whether or not I want to delay our input. 01:12.720 --> 01:13.730 Nodaway 01:17.480 --> 01:22.460 that it's in here. 01:23.870 --> 01:31.990 Copy this in mind it's the file. 01:32.520 --> 01:45.220 And you put this in the dot file and then ended up CBP file going to include curses you tildes done 01:45.300 --> 01:48.850 each and I'm going to implement it. 01:49.940 --> 02:00.240 So for the initialization really all it's going to be is to look second 02:02.960 --> 02:06.090 actually up here in P. 02:06.090 --> 02:13.060 I'm also going to include curses says this. 02:13.360 --> 02:23.680 So again this is for Mac here on Windows you should be doing include curses. 02:23.880 --> 02:24.960 It's a 02:29.890 --> 02:30.830 sue. 02:30.850 --> 02:36.170 Now we should write the function to initialize curses. 02:36.180 --> 02:48.460 So don't say it it's in that I don't ever want Echo because he's this for games I don't ever want the 02:49.540 --> 02:50.200 cursor 02:56.100 --> 02:59.590 and I'm going to set the no delay 03:03.170 --> 03:14.370 no this no delay capital-T are naming convention and I'm going to say no delay here because maybe I 03:14.370 --> 03:17.370 want turn based games later. 03:18.410 --> 03:21.950 And I'm always going to keep that 03:26.190 --> 03:30.790 screen any more. 03:32.540 --> 03:42.860 The first function we're going to have for our little utility library next function is going to be shut 03:43.010 --> 03:46.670 down curses. 03:46.800 --> 03:48.600 It's going to take no crammer's 03:51.840 --> 04:00.880 or copy that or put this here and we're in when that. 04:00.900 --> 04:07.610 So that's like that's already two functions to use. 04:07.680 --> 04:10.470 And let's actually start testing this. 04:10.470 --> 04:15.300 So instead of using it including this here 04:17.880 --> 04:29.180 to include our own curses you do this to each answer in that say 04:32.430 --> 04:33.980 initialize 04:36.240 --> 04:40.050 curses in case get false. 04:40.050 --> 04:40.560 For now 04:43.220 --> 04:58.620 and when you say sure or well I guess since I don't wait till later for that we're going to say Shut 04:58.620 --> 05:01.440 down here. 05:01.550 --> 05:05.130 It's that way. 05:05.290 --> 05:09.260 So I come back to this periodically and keep adding things. 05:09.310 --> 05:19.940 And so the next thing I need is the let's do clear screen we're screen 05:24.160 --> 05:25.120 copy this 05:28.130 --> 05:31.130 in here is going to say clear 05:33.930 --> 05:41.980 Dovid or clear screen function and also need our refresh the screen. 05:42.610 --> 05:43.030 Wow 05:48.980 --> 05:50.830 so copy that. 05:53.210 --> 05:57.280 Here is trash. 05:57.320 --> 06:05.170 So the point of doing all this is just going to be so we don't really have to keep every input reimplementing 06:05.270 --> 06:08.700 everything we initialize and shut down everything. 06:08.720 --> 06:18.660 Each time we'll just call functions and it also makes it for you know if you want to kind of portably 06:20.040 --> 06:23.700 use this or maybe that curses invalidation changes shape. 06:23.760 --> 06:25.420 Highly doubt at this point. 06:25.640 --> 06:29.240 But if it did we could just implement everything. 06:29.430 --> 06:37.450 Reimplement everything here instead of changing all of our programs directly. 06:37.620 --> 06:44.710 OK so we have that you only need a couple more things. 06:44.720 --> 06:46.970 Am I going to want 06:49.450 --> 06:57.700 the say the the screen with 07:01.650 --> 07:09.600 and shikse turn integer and are also going to need screen height 07:14.630 --> 07:20.850 copies. 07:20.980 --> 07:22.510 Put them here. 07:27.230 --> 07:29.080 And to get the whip. 07:29.100 --> 07:35.680 The screen is just columns to get height is the line. 07:35.980 --> 07:40.830 Right. 07:41.010 --> 07:44.470 And what else do we need. 07:45.540 --> 07:47.300 Well let's do 07:50.110 --> 08:05.020 character so we're going to see in each and then get Schar and remember it's into because we want so 08:07.320 --> 08:22.620 said here and all it's going to do is turn good character now in our app here say get rich character 08:22.650 --> 08:23.770 like that. 08:24.170 --> 08:24.730 OK. 08:27.870 --> 08:37.080 So the next thing is won't you be able to set a character. 08:37.330 --> 08:38.200 Boyd 08:41.970 --> 08:53.540 or maybe we should call it raw character and we'll give it the inte exposition and the y position and 08:53.540 --> 08:56.230 notice it's X before y now. 08:57.410 --> 09:05.410 And character itself character. 09:05.730 --> 09:09.120 Copy this. 09:09.500 --> 09:11.140 Here is 09:14.690 --> 09:15.200 here. 09:15.220 --> 09:18.500 You say return or not returns. 09:18.520 --> 09:30.040 And the add character and exposition or why position gets first and then exposition and then the character 09:35.210 --> 09:45.520 so this whole thing that we're doing is usually called the wrapper technical term and that's to to hide 09:45.520 --> 09:47.720 implementation details. 09:50.470 --> 09:52.770 What else are you going to need. 09:52.770 --> 09:56.940 We're going to need say 10:01.390 --> 10:11.610 maybe maybe once the move wrap Well we'd move cursor 10:14.230 --> 10:20.360 and say in x x rows. 10:20.580 --> 10:21.410 Why. 10:21.460 --> 10:33.520 Now we can do X X first and then Y. 10:33.820 --> 10:37.940 Move y pause x ball. 10:43.970 --> 10:47.390 There'll be another one that we need. 10:47.410 --> 10:53.590 But I don't want to really want to implement it right now. 10:53.720 --> 10:58.030 I'm going to save that for our game actually. 10:58.100 --> 11:06.640 So for now we're going to say we're still going to include curses up here. 11:06.740 --> 11:08.590 We need it. 11:10.920 --> 11:24.130 At but we're only really need it for this function in we'll say 10 10 11:26.810 --> 11:30.380 a string string. 11:36.630 --> 11:38.520 And run it. 11:42.360 --> 11:43.710 It's still working. 11:43.830 --> 11:47.750 It's good. 11:47.840 --> 11:50.540 And the last thing we're going to do 11:53.340 --> 12:00.500 you're is actually we're going to move this to each 12:03.300 --> 12:12.630 this and we're going to make an and he is going to be arrow keys. 12:14.720 --> 12:16.510 Or actually sorry arrow. 12:18.430 --> 12:19.880 He's this 12:22.460 --> 12:28.590 and I say up is he 12:31.600 --> 12:34.220 down is he down. 12:36.160 --> 12:44.670 In left he left in right. 12:44.720 --> 12:46.860 Is he right. 12:50.430 --> 12:57.630 So we're kind of making our own arrow keys and we're just setting it to be the 13:00.070 --> 13:02.110 curses version. 13:04.390 --> 13:14.140 So that's it for now we may add some things to curses you still a little bit later when we actually 13:14.140 --> 13:17.590 tackle the game itself. 13:18.100 --> 13:25.200 So in the next section we'll finally do our Space Invaders clone called TECS invaders. 13:25.240 --> 13:26.610 So I'll see you then.